Rotary lithographic machine.



R. P. PAYNE. ROTARY LITHOGRAPHIG MACHINE. APPLICATION nun) NOV. 21, 19 2.

1 1 1 3, 1 37. Patented Oct. 6, 1914.

- E e/afar 706 fizass es THE NOR RIS PETERS co. PHOIO-LITHQ. WASHINGTON. 04 c4 our ED sra'rns PATENT orrio RAYMOND PERGIVAL PAYNE, OF L EEDS, ENGLAND, ASSIGNOR TO GEORGE M ANN Sz, COMPANY, LIMITED, OF LEEDS, ENGLAND.

i ROTARY LITHOG-RAPHIG lvCtACHINE.

To all whom; it may concern:

Be it known that I, Rariuonn PAYNE, a subject of the Britain, residing in Leeds, England, and whose post-office addressuis 156 Beeston road, Leeds, in the county of York, Eng land, engineer, have invented certain new PnncIvAL and useful Improvements in Rotary Lit-ho of which the following of lithographic printing) is more or less absorbed by the ink upon the inking rollers and in this manner the printing quality of the ink is impaired, unless these inking rollers are separated from their contact with the water for a period ofat least as long as the period of the contact.

By this invention in any rotary lithographic machine in which the design-plate or the like occupies more than one-half of the periphery surface of the design cylinder, or the whole of that, surface, the inking rollers are distributed into two or more groups of one or more rollers, and it is arranged that the rollers or roller of one at least of these groups are not in contact with the water which lies upon the surface of the design-plate at each revolution or portion of a revolution of the design-cylinder. In other words, if a first group of rollers ink the design plate during one revolution (the plate in this case occupying the whole periphery of the design-cylinder) this group is taken out of action at the end of this revolution and a second group of rollers is brought into action so as to ink the plate during the next revolution. If the plate does not occupy the whole periphery of the design-cylinder the rollers are of course in operation only during a portion of the revolution. For instance, at least one ofthe groups of one or more rollers may be lifted ateach revolution or part of a revolutionso as to effect the object in view.

In the accompanying diagrammatic draw- Specification of Letters Patent.

King of Great Application aieanovemberm,1912. mammna. e 1

mg, graphic machine, isfitted with a plate b which is shownoccupying the whole peripheryof the cylinder. Inking rollersci and c are shown arranged intwo, groups of four rollers in, each group, rollers a being in contact with the plate Landmollers c out of contact with the plate. A means for? can rying the ink from an ink fountain to to the inking rollers and 0 is also shown and damping rollers (Z are shown in contact with the plate. Shaft ie is carried in bearings in the framework of the machine and is arranged to make two revolutions toeach revolution of the cylinderi a'. if

On the shaft 6 are two c ms, notfshown} in thefdrawing, one of which engagesthep runnerf and thus moves an arm 9 on a shaft h which also carries an arm in The latter is connected by link Z with a lever m, which is pivoted on a portion of the bearing the plate cylinder c of a rotary litho:

of the cylinder 0 Pins n n in the lever m form pivots for links 19 p which are provided at their other ends with pins 9 9 form- 1 ing pivots for levers 7' r. The levers r 1' carry forked bearings s s for the inking 1 rollers 0 0 and are also pivoted on pinst, z". The links 79 p are also provided with cam shapes embracing the pins 16 u so as to actuate also levers '1) "v and the remainder of the rollers c of this group. The whole of this motion is shown in the position in which the rollers c are in contact with the plate. parts f, v, and operate similarly on the inking rollers 0 and the whole of this mo- The parts f '0 are similar to the tion is shown in the position in which the rollers 0 are raised from the plate. By

such means each group of rollers is raised I and lowered alternately during each revolution of the plate cylinder, the cam'shapes on the shaft 6 beingso arranged that there a is always one group of rollers in contact with the plate 1 Having now described the nature of my said invention and the best means I know of carrying the same into practical effect, I claim 1 1. In a rotary lithographic machine,-the combination of a design cylinderadapted for printing a design extending over more than half its periphery, a groups of inking rollers, and meansadapted to operate eachgroup in: ing the design cylinder during azcomplete plurality of a turn for ink Copies of this patent may be obtained for revolution thereof throughout the process of printing.

2. In a rotary lithographic machine, the combination, with a design cylinder and its design plate, of a plurality of groups of inking rollers adapted to be used alter nately during the progress of printing, and means operating to move the said groups of inking rollers continuously and alternately one group at a time into and out of contact With the design plate during the progress of printing.

3. In a rotary lithographic machine, the combination with a design cylinder and its design plate, of a plurality of groups of inking rollers adapted to be used alternately during the progress of printing, and means operating to move the said groups of inking rollers continuously and alternately a number at a time less than the Whole of such groups, into and out of contact with the design plate during the progress of printing.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

RAYMOND PERCIVAL PAYNE. lVitnesses JOHN HENRY VILLIAMSON, ARTHUR BURROUGI-IES EVANS.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. I 

